Codebook searching method and device

A search method and codebook technology, applied in the field of codebook search methods and devices, can solve problems such as ineffective application and increased computational complexity

Active Publication Date: 2017-09-29
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, although the above traversal method can obtain the optimal precoding matrix, as the number of codebooks increases, the compu

Method used

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  • Codebook searching method and device

Examples

Experimental program
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Embodiment 1

[0048] This embodiment provides a codebook search method, such as figure 1 As shown, the processing flow of the method of this embodiment includes the following steps:

[0049] Step 101. Search for the first optimal precoding matrix from the precoding matrix set.

[0050] Usually, a codebook is a set of several precoding matrices, that is, a set of precoding matrices, which can be expressed as C={W 0 ,W 1 ,...,W i ,...,W N-1}, and 0≤i≤N-1, the N is the number of precoding matrices in the set of precoding matrices; in the initial case, the codebook search device will search out the first The optimal precoding matrix of order 1.

[0051] Here, the codebook search device may use a traversal search method or other search methods to search all the precoding matrices in the precoding matrix set, and search for the first optimal precoding matrix from the precoding matrix set .

[0052] Optionally, the codebook search device can use the traversal search method to search for the...

Embodiment 2

[0093] The embodiment of the present invention also provides a codebook search device, such as figure 2 As shown, the device includes: a search unit 201 and a determination unit 202, wherein,

[0094] The search unit 201 is configured to search for the first optimal precoding matrix from the precoding matrix set;

[0095] The determining unit 202 is configured to determine the nth codebook search subset according to the n-1th optimal precoding matrix and the nth chord distance level searched by the searching unit 201; The nth codebook search subset is a subset of the precoding matrix set;

[0096] The searching unit 201 is further configured to search for an n-th optimal precoding matrix from the n-th codebook search subset determined by the determining unit 202; wherein, the n is 2, ..., m, the m is an integer greater than or equal to 2.

[0097] Optionally, the determining unit 202 is specifically configured to determine the n-th optimal precoding matrix and the n-th cho...

Embodiment 3

[0110] The embodiment of the present invention also provides a codebook search device, such as image 3 As shown, the device includes: a storage module 301, a codebook search selection module 302, a channel time correlation evaluation module 303, and a codebook search subset determination module 304; wherein,

[0111] The storage module 301 is configured to pre-store a corresponding relationship, and the corresponding relationship is a corresponding relationship between a precoding matrix index, a chordal distance level, and a codebook search subset;

[0112] The codebook search and selection module 302 is configured to search for the first optimal precoding matrix from the precoding matrix set;

[0113] The channel time correlation evaluation module 303 is used to monitor the channel time correlation index in real time and calculate the channel time correlation index value for the nth time;

[0114] The codebook search subset determination module 304 determines the nth chord...

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Abstract

The embodiment of the invention discloses a codebook searching method. The method comprises the following steps: searching for a first optimal pre-coding matrix from a pre-coding matrix set; determining an nth codebook searching subset according to an (n-1)th optimal pre-coding matrix and an nth chordal distance level, wherein the nth codebook searching subset is a subset of the pre-coding matrix set; and searching for an nth optimal pre-coding matrix from the nth codebook searching subset, wherein n is 2,...,m, and m is an integer being greater than or equal to 2. The embodiment of the invention also discloses a codebook searching device.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a codebook search method and device. Background technique [0002] Currently, Multiple-Input Multiple-Output (MIMO) technology, as one of the main methods to improve the spectral efficiency of wireless communication, has been applied to wireless local area network communication standard 802.11n / ac, Long Term Evolution (LTE ) / Enhanced Long Term Evolution (LTE-Advanced, LTE-A) and other new-generation high-throughput wireless communication protocols. [0003] In practical applications, because the channel between the base station and the terminal in the MIMO wireless communication system has time-varying multipath fading characteristics, the base station uses precoding technology to ensure the reliability of transmission and improve system performance. The existing codebook-based limited feedback precoding technology is widely used because the amount of data to be transmitted...

Claims

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Application Information

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IPC IPC(8): H04B7/0456
CPCH04B7/0456H04B7/04
Inventor 易立强
Owner SANECHIPS TECH CO LTD
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